Unlike systems built using the deep-embedded Signal type of ForSyDe
(see ForSyDe.Signal), systems built with ForSyDe.Shallow.Signal
can make use of new and experimental features such as multiple,
heterogeneous MoCs (Models of Computation) other than the Synchronous
MoC (the only Model of Computation currently supported by deep-embdded
ForSyDe). However, as an important tradeoff, ForSyDe.Shallow.Signal
is unaware of the resulting system structure, only allowing simulation
(i.e. a VHDL or GraphML backend is impossible to implement).

The shallow implementation of ForSyDe consists of three main libraries: